checkboxes

phpwand

hi, i am new to javascript and php.

i have a form with only checkboxes and a submit button.

i need to validate this form in a such a way:
ONLY IF ATLEAST ONE CHECKBOX IS CHECKED then the elements of the form are POSTED to the action specified under the action attribute of <form>

i need to get the value specified with the checked checkboxes in the page getcheckedvalues.php

i then want to run a query for each value received by the page getcheckedvalues.php

.....here is a code i cooked up with help from smethng i found online, but it doesnt work properly yet..........

<head>
<script>
function check(){
count = 0;
for(x=0; x<document.form1.checkbox.length; x++){
if(document.form1.checkbox[x].checked==true){
count++
}
}

if(count==0){
	alert("You must choose atleast 1");
	return false;
}

else {
	<!--condition if atleast one is checked..but from here i dont know wat to do..

}

}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="getcheckedvalues.php" >
<input type="checkbox" name="A" value="1"/>A
<input type="checkbox" name="B" value="2" />B
<input type="checkbox" name="C" value="3"/>C
<input type="submit" name="button" id="button" value=" VOTE! " onclick="check();"/>
</form>
</body>

EvilDevDog

This would be a cinch if you were using jQuery. You'd just give your checkboxes a class (say..."mycheckbox"), then...

function checkForm() {
    var submit_ok = false;

// Perform custom function on each "mycheckbox"...
$('.mycheckbox').each(function() { if (this.checked == "true") submit_ok = true; });

return submit_ok;
}

Assuming you're not using jQuery, the simplest method (not best or most efficient) is to grab all "input" fields and check their names and then the "checked" property.

function checkForm() {
    var submit_ok = false;

// Get array of input objects...
var fields = getElementByTagName("input");

// Check each input object...
for(var i = 0; i < fields.length; i++) {
    // Skip the "submit" button...
    if (fields[i].name == "submit")
        continue;

    // Check the "checked" property on the remaining checkboxes...
    if (chks[i].checked == "true")
        submit_ok = true;
    }

return submit_ok;
}